You were only 17 when your classmate Jin murdered you. He strangled you to death on a class trip without telling you why. You both never really talked much and it all happened pretty fast. It all went black and when you opened your eyes, you realised that you’re now a ghost. You walked towards Jin, trying to make him trip since you couldn’t do much more as a ghost. But then he dodged your foot, as if he could see you

Jin: “What’re you trying to do? Stop being so annoying”